Once upon a time I was working with a psychologist who wanted me to do a take-home exercise. Knowing that I was a software developer and an excellent typist, she insisted that I perform the exercise while writing by hand. She said that it was because I would be using a different part of my brain when handwriting than if I were typing.
Which brings us back to the whiteboard interview. I ask: If I am correctly interpreting what the psychologist said, why force interview candidates to use their brains differently than they normally would while coding?